CURLMOPT_PIPELINING_SERVER_BL - pipelining server block list

Added in curl 7.30.0

NULL, which means that there is no block list.

No function since pipelining was removed in 7.62.0. Pass a servers array of char *, ending with a NULL entry. This is a list of server types prefixes (in the Server: HTTP header) that are blocked from pipelining, i.e server types that are known to not support HTTP pipelining. The array is copied by libcurl. Note that the comparison matches if the Server: header begins with the string in the block list, i.e "Server: Ninja 1.2.3" and "Server: Ninja 1.4.0" can both be blocked by having "Ninja" in the list. Pass a NULL pointer to clear the block list.

static char *server_block_list[] = { "Microsoft-IIS/6.0", "nginx/0.8.54", NULL }; int main(void) { CURLM *m = curl_multi_init(); curl_multi_setopt(m, CURLMOPT_PIPELINING_SERVER_BL, server_block_list); }

CURLMOPT_PIPELINING_SERVER_BL - pipelining server block list

This functionality affects http only

curl_multi_setopt(3) returns a CURLMcode indicating success or error. CURLM_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).

CURLMOPT_PIPELINING(3), CURLMOPT_PIPELINING_SITE_BL(3) libcurl 2025-06-16 CURLMOPT_PIPELINING_SERVER_BL(3)

#include <curl/curl.h> CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_PIPELINING_SERVER_BL, char **servers);